Upon striking the antenna, a radio wave causes an R.F. current to flow in the primary winding or “Antenna Coil” of the R-F transformer; and since this current is of an oscillatory nature, it will induce a voltage of corresponding frequency on the receiver’s tuning circuit. Rectification of this signal by the detector makes the signal audible in the headphones.


The 1st radio station DXCC, officially went on air in Cagayan de Oro, on August 28, in honor of the town’s patron saint, St. Augustine.

Local businesses came to the station to advertise their products, from bakeries to tailors.

A horse drawn carriage with a loudspeaker served as the first roving reporters and pioneered remote broadcasting throughout the city.